public class HMapTest {
    public static void main(String[] args) {
        HNMap<Integer, String> map = new HNMap<>();
        map.put(1, "1");
        map.put(2, "2");
        System.out.println(map.get(1));
        System.out.println(map.get(2));
        System.out.println(map.get(3));
        map.put(2, "22");
        System.out.println(map.get(2));
    }
}
